You can also get more Flamethrower TMs at the Game Corner for the same price as the Ice Beam TM. (Just buy the necessary coins; don't bother trying to win them.) Dragon Dance is a move that Rayquaza could normally learn at level 30 - if it levelled up in that manner. I was under the impression that the Move Tutor could teach it to Rayquaza, although the guide I normally use says otherwise now that I look at it. One of the more experienced members may know.